Police said that Karl Pierson, 18, walked into Arapahoe High School and shot Davis once in the head with a shotgun, then fired randomly into school hallways. Police said Pierson wanted revenge on a librarian, but killed himself before finding the unnamed staff member. Davis appears to have been a random target, caught in sight at an opportune moment for Pierson.

The Davis family released a statement later Saturday.

“Although we have lost our precious daughter, we will always be grateful for the indelible journey she took us on over the last 17 years—we were truly blessed to be Claire’s parents,” Davis’ family said. “The grace, laughter and light she brought to this world will not be extinguished by her death; to the contrary, it will only get stronger.”